NDA 2023 GAT · General Knowledge · Human Physiology · easy

The hormone that prepares the body for emergency situations by increasing the heart rate is

Single correct option

A. Insulin
B. Thyroxine
C. Oestrogen
D. Adrenaline

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Answer: (D) Adrenaline

Adrenaline from the adrenal medulla raises heart rate and blood sugar in fear or stress, the fight-or-flight response. Insulin lowers blood sugar, thyroxine controls metabolism and oestrogen is a female sex hormone.

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